The type of cell division that occurs during growth and repair is: MCQ with Answer and Explanation

Explanation:
Rudolf Virchow, in 1855, added the third tenet to the cell theory: 'Omnis cellula e cellula', meaning all cells arise from pre-existing cells. Schleiden and Schwann proposed that plants and animals are composed of cells (first two tenets). Robert Hooke discovered cells. Virchow's concept refuted spontaneous generation and established the continuity of life.

Explanation:
Plasmodesmata are microscopic channels that traverse the cell walls of plant cells, enabling the transport of water, ions, molecules, and even some viruses between them, thus ensuring cytoplasmic continuity. Gap junctions perform a similar function in animal cells, while tight junctions and desmosomes are for sealing and adhesion, respectively.

Explanation:
The loop of Henle creates a countercurrent multiplier system in the medulla, establishing an osmotic gradient that allows the collecting duct to reabsorb water and produce concentrated urine. The other parts handle filtration, reabsorption, and secretion.